Thread-drawing and thread-cutting mechanism for sewing-machines.



F. J. KAUFMANN & W. N. MARSDEN.

THREAD DRAWING AND THREAD cunme MECHANISM FOR SEWING MACHINES.

APPLICATION FILED DEC- 7. I912.

Patented Apr. 27, 1915.

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F. J. KAUFMANN & W. N. MARSDEN.

THREAD DRAWlNG AND THREAD CUTTING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED DEC. 1. I912.

Patented. Apr. 27, 1915.

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FRANK J. KAUFMANN AND WILLIAM N. MARSDEN, OF AMSTERDAM, NEW YORK, AS-

SIGNORS TO FOWNES BROTHERS AND COMPANY, OF LONDON, ENGLAND, A FIRMCOMPOSED 0]? WILLIAM GARDNER RIGDEN,

WILLIAM FOWNES- R-IGDEN, EDWARD FOWNES RIGrDEN, STANLEY FOWNES RIGDEN,SAMUEL J. URWICK, AND .I'IENRY URWICK.

THREAD-DRAWING AND THREAD-CUTTING MECHANISM FOR SEWING-MACHINES.

To all whom it may concern:

Be it known that we, FRANK J. KAUF- MANN and WILLIAM N. MARSDEN,citizens of the United States of America, residing in Amsterdam, countyof Montgomery, and State of New York, have invented a certain new anduseful Improvement in Thread- Drawing and Thread- Cutting Mechanisms forSewing-Machines, of which the following is a specification. p

This invention relates to thread drawing and thread cutting mechanismsfor sewing machines, and has for its object a means to economize time informing the seams, to materially eliminate defective work and to effectsubstantial and desirable economy in the amount of the delicate andexpensive silk threads commonly used for ornamentally stitching glovesorother articles.

As regards the seam stitching mechanism the invention relates moreparticularly to that kind of sewing 'machine, usually equipped with aplurality of needles, employed extensively in the manufacture of gloves.In glove making, the back of the glove is ornamented by a plurality oflongitudinal lines of broad stitching, technically known as Brosserpoint; and the sewing machines within this invention are those employedfor running one or more lines of stitching known as Harris or Imperialpoint along each side of the line of Brosser point. Such Harris orImperial point stitching should have at the beginning and terminationthereof a sufficient length of free thread to permit of the ends beingpassed through to the inside and tied or otherwise secured.

In machines equipped with the structural features of my invention, andoperating according to that invention, there is provided a suitablemeans whereby the operator may cause a definite extent of slack in thethread between the needle and the spool, when a stitching operation hasbeen completed. A gage is provided adjacent the needle whereby a pointmay be indicated according to which the slack, after it has been drawnthrough the needle, may be severed so as to leave just the lengthnecessary to fasten the finished seam and to begin Specification ofLetters Patent. Patented'Apr, 27, 1915. Application filed. December 7,1912. Serial No. 735,371.

a new one. When the stitching is =completed, the slack having beenexactly determined and supplied, the presser foot must be raised andloops afforded by the slack thread may be drawn away from the needles.The gage indicates to the operator just where the loops should be cut sothat there shall be left atthe ends of the lines of stitching. on thearticle sufficient free lengths of thread and in the needles freelengths of thr ad f sufficient length to provide for the slight take-upthat occurs when a new stitching operation iscommenced andleavefattached to the next sewn article or glove blank a required extentof free thread at the beginning of the lines of stitching. The gage maybe, and preferably is, not only a gage but also a cutter so that when aninstrument of suitable width is passed under the presser foot when aline of stitchlng has been completed, loops are thus formed and may becarried away from the presser foot, and the two sides of the loops willbe suiiiciently separated to permit of one of the sides of each loopbeing severed by pressing them against the cutting edge of the gage.

In the accompanying drawing: Figure 1, is a front elevation indicating adouble needle machine equipped according to this invention; Fig. 2, anelevation of the left hand side thereof; Figs. 3, 4: and 5 arerespectively a front elevation, a plan view and side elevationillustrating the manner of gaging and cutting the thread loop; and Fig.6 a view, showing a suitable tool for handling the thread loop.

The special means shown for providing the required amount of slackthread comprises an arm 1 hinged on the front part of the head at 2 andhaving at its upper free end a loop 3 through which the threads pass.The arm hasa reaction spring 5 that tends to hold it in uppermostposition and its downward movement is limited by an adjustable stop 6 sothat when a stitching operation is completed and the slack threadrequired, the operator simply presses down the arm to draw from thespools or bobbins the required amount of slack and when re leas d thearm may return automatically I to normal position." 'Any means, however,by which the operator may draw the required' amount of slack thread maybe head and under the path of the thread. The I operator may then placeher fore finger on the arm and press it down until it is arrested by thestop. The gage is shown as a 7 plate 8 mounted upon a bracket on thehead of the machine-just above the bed plate andiniear of the presser'foot. The upper .edgeiS of the gage is fashioned to asharp knife edge.Fig. 6 indicates a suitable tool having abroad flat body-9, a hooked'end lOandafnotch 11in the rear edge of the flatbody.- Whenithestitching operation is completed and after the arm 1, is depressedtoprov'ide'ameasured thread slackness and thefpresser foot is raised"the two loops X one for each of the two needles shown, arecarried.rearwardly over the gage by the fiatwis'e held tool body 9, aseasily permitted by the thread slackness and without imminen t danger'of breaking the delicate threads, the ilateral length of the'dra-wnloops being limitedornieasured by the' 'extent of sl'ackne ss'previouslygiven the'threads by depressing the arm 1, to the stop 6, or 7. When thethread loops are drawn rearwardly, 'thetool may be turned edgewise v asseen in Figs. i 'and 5 and the threads seated in the tool notch 11. Theupper and lower branches of; the loops are then sufficiently farseparated to permit'of the lower branches 12 being out by pressing themagainst the cutter, thus leaving attached to the article lengthsofthread 12 and to the needles somewhat greater lengths of thread lVhe'nthe next sewing operation is commenced some parts of the lengths ofthread attached to the needles will be taken 7 up by'the first fewstitches.

our-invention the thread may be steadily drawn through the tensiondevices toa predetermined measured extent of slackness'bv an easilycontrolled manual depression of the arm 1, to its stop, and withlittlejor no danger of breaking a delicate thread, and the thread loopor loops are laterally drawn with little friction only, through theneedle by the manually operatedtool and to the full extent of theslackness previously and definitely measured by operationofthestop-limited manually actuated arm 1, whereby there is amplenonw'asteful length of severed thread left in V V the needle or needlesof our machine to assure safe starting ofv the next sewing operationwithout requiring time-consuming hand-pulling of the severed thread endv through the needle. In prior machines there is no 'toolfor devicewhereby the thread is drawn through the needle to the full ex- Thisoperation is also apt to waste thread.

As regards the hereindescribed and claimed improvements in the art ofproducing machine stitched fabric seams, it is not essential that thethread loops be severed at a definitely indicated place, or that theprojecting thread ends be passed inwardly through the fabric so as to beinvisible at the outer face thereof, or that the inwardly passed threadends of two rows of stitches shall be tied together at the inner face ofthe work, but in practicing the invention for the special purpose abovenamed of ornamenting the backs of gloves, it is desirable to use allthese operative steps or features of our invention.

We claim:

1. A sewing machine having a manually operative pivoted arm locatedbetween the spool and the head of the machine through an opening in thefree end of which arm the thread passes, means tending to hold the armin an elevated position, and means for limiting depression of the armwhereby a definite amount of slack thread is provided by actuation ofthe arm and independently of release of a sewn fa bric from its holdingor feeding devices, and a gage for determining the point at which thethread is to be severed.

2. A sewing machine having a manually operated pivoted arm locatedbetween the spool and the head of the machine through an opening in thefree end of which arm the thread passes, means tending to hold the armin an elevated position, and means for limiting depression of the armwhereby a definiteamount of slack thread is provided by actuation of thearm and independently of release of asewn fabric from its holdinorfeedi'ng devices, and a fixed gage located adjacent the presser footof the machine and comprising a plate having a cutting edgeindicatingwhere'a laterally drawn thread loop shall be cut at thetermination of a stitching operation, substantially as described. r i

3. A sewing machine having a spindle for a spool, a reciprocatingneedle, an arm located between the spindle and the needle, saidarm beingpivoted on the front part of the head and extending rearwardly andupwardly, and having a loop in its free end through which the thread maypass, a spring for holding said arm raised, and an ad- 1,137,143 7 lat:

justable stop on the base of the head within reach of the pivoted arm,substantially as described.

4:. A sewing machine having a spindle for a spool, a reciprocatingneedle, an arm located between the spindle and the needle,

said arm being pivoted on the front part of the head and extendingrearwardly and upwardly, and having a loop in its free end through whichthe thread may pass, a spring for holding said arm raised, an adjustablestop on the base of the machine within reach of the pivoted arm, abracket on the machine, and a gage mounted in said bracket just abovethe bed plate and in rear of the presser foot, substantially asdescribed.

5. A sewing machine having a spool spindle, a reciprocating needle, apivoted rearwardly extending arm between the spindle and the needle, anopening in the free end of said arm, means for yieldingly holding saidarm in raised position, a stop against which said arm may strike whenswung downward, and a gage arranged in proper relation to the stop andthe needle for 'determining the point at which the thread is to besevered, substantially as described.

6. A sewing machine having a spool spindle, a reciprocating needle, apivoted rearwardly extending arm between the spindle and the needle, anopening in the free end of said arm, means for yieldingly holding saidarm in raised position, a stop against .which said arm may strike whenswung downward, and a gage knife with its edge upturned secured to thehead of the machine in proper relation to the stop and the needle,substantially as described.

7. A sewing machine having a spool spindle, a reciprocating needle, avertically movable, thread engaging means between the spindle and theneedle, and means to limit the movement of said thread engaging means,the lower of such limiting means be- 9. A multiple needle sewing machinehav- I ing means for supporting spools, needles, a spring-held swingingarm pivoted to the head, an opening in said arm through which threadsmay pass, a stop against which said arm may strike when swung downward,and a cutting gage in the rear of the needles for determining the pointat which the thread is to be severed, substantially as described.

10. A sewing machine having a spool spindle, a reciprocating needle, apivoted rearwardly extending arm between the spindle and the needle, anopening in the free end of said arm, means for yieldingly holding saidarm in raised position, a stop against which said arm may strike whenswung downward, a gage knife arranged in proper relation to the stop andthe needle, and a flat bladed tool having a suitable notch, whereby thethread loop formed by the descent of said arm may have one of itsmembers brought into engagement with the gage knife, substantially asdescribed.

In testimony whereof, we have hereunto subscribed our names.

FRANK J KAUFMANN. WILLIAM N. MARSDEN. Witnesses:

VJAMES W. FERGUSON,

CLARA I. RAwDoN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

